NEURAL CORRELATES OF STEREOSCOPIC PERCEPTION

立体感知的神经关联

• 批准号: 2888277
• 负责人: BENJAMIN T BACKUS
• 金额: $ 3.17万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-08 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/2888277
• 关键词: binocular vision; computational neuroscience; form /pattern perception; functional magnetic resonance imaging; human subject; neural information processing; psychophysics; visual cortex; visual depth perception

The proposed research is designed to identify and measure the neural substrates of stereo depth perception, by comparing perceptual data with functional magnetic resonance imaging (fMRI) measurements of brain activity in specific brain areas. Brain areas where the neural activity correlates with the percept may be involved in, or responsible for, stereo depth perception. Our general approach will be to replicate experiments that have yielded landmark findings in stereo psychophysics, while collecting fMRI measurements of brain activity. The fMRI data will be analyzed separately in each of several identifiable visual brain areas to link brain activity with perception, and to test psychophysically-motivated theories about how stereoscopic vision works. The specific aims of the proposed research are: (1) to measure and characterize fMRI responses to binocular stimulation in each of several brain areas, and to identify brain areas that respond to stereoscopic stimuli; (2) to compare brain activity and psychophysical upper depth (maximum disparity) limits; and (3) to compare brain activity and temporal depth modulation thresholds (rate of stereo vision processing). These experiments could improve out understanding of stereoblindness, which affects 6-7 percent of the US population.

拟议的研究旨在识别和测量神经 通过将感知数据与 大脑功能磁共振成像 (fMRI) 测量 特定大脑区域的活动。 大脑中进行神经活动的区域 与可能参与或负责的感知相关 立体深度感知。 我们的一般方法是复制 在立体心理物理学方面取得了里程碑式发现的实验， 同时收集大脑活动的功能磁共振成像测量结果。 功能磁共振成像数据 将在几个可识别的视觉大脑中分别进行分析 将大脑活动与感知联系起来并进行测试的区域 关于立体视觉如何工作的心理物理驱动理论。 拟议研究的具体目标是：（1）测量和 表征功能磁共振成像对双眼刺激的反应 大脑区域，并识别对立体视觉做出反应的大脑区域 刺激； (2) 比较大脑活动和心理物理上层深度 （最大差异）限制； (3) 比较大脑活动 时间深度调制阈值（立体视觉处理速率）。 这些实验可以增进对立体盲的理解， 影响了 6-7% 的美国人口。